By Dennis Adler
Let’s recap the features and advantages of the new Umarex HK USP blowback action model. This is a 1:1 CO2 pistol in the standard HK V1 configuration: DA/SA with safety/decocking lever on the left side. It accepts all of the Universal mount equipment made for the centerfire models as well as the USP Picatinny rail adapter. The Umarex has the identical ambidextrous dual magazine release lever integrated into the bottom of the triggerguard. Developed in the early 1990s for the U.S. Army under the SOCOM project (United States Special Operation Command), the USP uses a polymer frame (injection-molded polyamide). As an historical footnote, Heckler & Koch was the first armsmaker to use a polymer frame, predating the Glock 17 by over a decade with the VP70. The centerfire USP and CO2 model share a common Browning-based short-recoil, locked breech design, that is modified for blowback action in the air pistol, but very close in appearance, operation, and virtually identical for field stripping.
The cartridge firing HK USP weighs an average of 29.5 ounces (with an empty magazine), has an overall length of 7.68 inches, width of 1.26 inches and barrel length of 4.25 inches. The overall weight of the USP CO2 model (with empty magazine) is 34.2 ounces due to the weight of the all-metal CO2 magazine. Overall length is 7.7 inches, width 1.26 inches and internal smoothbore barrel length 4.25 inches. Trigger pull on the centerfire gun averages around 5 pounds fired single action and a robust 12 pounds average double action. The CO2 model stacks up pretty close with an average SA trigger press of 5 pounds, 1.5 ounces and a DA pull of 11 pounds 8.0 ounces (and de-cocked trigger pull of 8 pounds average). Like 9mm, .40 S&W and .45 ACP models, the DA pull is a long 0.68 inches but it is smooth and the hammer comes back quickly as you pull through. There is zero over travel, and of course, after the first round the gun fires single action unless it is de-cocked. SA take up is 0.25 inches and reset is 0.25 inches.
In my training drill I performed drawing from the Sig-Tac Level 1 locking holster, firing to empty, dropping the magazine, reloading and firing, and a tactical reload. The Umarex HK USP performed without a hitch, duplicating the handling of the centerfire gun right up to the moment the trigger was pulled.
As mentioned in the earlier shooting tests, the slide has a firm draw when chambering the first round (heavier than almost any other blowback action model) and there is more than ample felt recoil for an air pistol when firing. As a training gun, the Umarex HK USP is right up with the Umarex S&W M&P40 for absolute training value in the field and indoors.
USP Tactical red laser at 21 feet
In a short range test, the NcStar red laser guided a full magazine, 16-rounds, into a spread of 1.12 inches with a best group of 12 shots measuring 0.62 inches with 8 rounds overlapping. This is the right tool for the job as a training gun in CO2, or for use with the centerfire pistol. Familiarity with the same device is always a training plus and the Umarex HK USP has everything going for it!